It's possible. Call it 50-75 meters across so it's big enough to hold some tech but not so huge that you spend an entire session exploring the thing.

That's the sort of thing I was thinking, but I was having difficulties determining the actual size of each to pick which version I should make use of._________________"The universe is driven by the complex interaction between three ingredients: matter, energy, and enlightened self-interest."
G'Kar, Survivors (Babylon 5)